/**
 * Copyright 2008 Mathias Doenitz, http://lis.to/
 *
 * This file is part of the lis.to java desktop client. The lis.to java desktop client is free software: you can
 * redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * The lis.to java desktop client is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with the lis.to java desktop client.
 * If not, see http://www.gnu.org/licenses/
 */

package listo.client.dialogs.autocompletion;

import com.google.inject.Inject;
import listo.client.ContextManager;
import listo.client.Preferences;
import listo.client.model.Task;
import listo.utils.guice.ManuallyScoped;
import listo.utils.swing.AutoCompleter;
import org.apache.commons.lang.StringUtils;

import java.util.Comparator;
import java.util.Set;
import java.util.TreeSet;

@ManuallyScoped("TaskDialogScope")
public class DescCompleter extends BaseCompleter {

    @Inject
    public DescCompleter(Preferences preferences, ContextManager contextManager) {
        Set<String> words = new TreeSet<String>(new Comparator<String>() {
            public int compare(String a, String b) {
                return a.toLowerCase().compareTo(b.toLowerCase());
            }
        });
        for (Task task : contextManager.getCurrentContext().getTasks()) {
            StringBuilder filtered = new StringBuilder();
            String desc = task.getDesc();
            for (int i = 0; i < desc.length(); i++) {
                char c = desc.charAt(i);
                filtered.append(Character.isLetter(c) || Character.isWhitespace(c) ? c : ' ');
            }
            String[] descWords = StringUtils.split(filtered.toString());
            if (descWords == null) continue;
            for (String word : descWords) {
                if (word.length() >= preferences.getMinimumCompletionWordLength()) words.add(word);
            }
        }
        availableOptions.addAll(words);
    }

    public void provideAutoCompletion(AutoCompleter.Context context) {
        if (context.getEventType() == AutoCompleter.EventType.TextTyped &&
                StringUtils.isNotEmpty(context.getCurrentWordTrimmedLower())) {
            super.provideAutoCompletion(context);
        } else if (context.getEventType() == AutoCompleter.EventType.UserRequest) {
            super.provideAutoCompletion(context);
            context.select(0);
        }
    }

    public boolean isWordSeparator(char c) {
        return c == ' ';
    }
}
